St. Augustine South, FL climate
St. Augustine South has warm winters and warm summers, with plenty of rain. A typical July afternoon reaches 90°, a January night drops to 47°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decade3° warmer than normal today. The forecast high is 87°, and a typical Oct 1 in St. Augustine South peaks around 84°.Live forecast: National Weather Service · Normal: NOAA 1991–2020
What a year in St. Augustine South feels like
Winter
Spring
Summer
Fall
St. Augustine South weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 66° | 47° | 3.1" | 0 | 9 | 0 | 50° – 63° |
| February | 68° | 50° | 3.0" | 0 | 8 | 0 | 51° – 68° |
| March | 73° | 54° | 3.3" | 0 | 9 | 0 | 57° – 71° |
| April | 79° | 61° | 2.8" | 0 | 7 | 0 | 65° – 74° |
| May | 84° | 67° | 3.4" | 0 | 7 | 0 | 71° – 79° |
| June | 88° | 72° | 6.6" | 0 | 12 | 0 | 78° – 85° |
| July | 90° | 74° | 5.7" | 0 | 12 | 0 | 80° – 85° |
| August | 89° | 75° | 7.4" | 0 | 15 | 0 | 80° – 84° |
| September | 87° | 73° | 7.6" | 0 | 14 | 0 | 77° – 84° |
| October | 81° | 66° | 4.7" | 0 | 9 | 0 | 70° – 79° |
| November | 73° | 57° | 2.7" | 0 | 8 | 0 | 60° – 72° |
| December | 68° | 50° | 2.8" | 0 | 8 | 0 | 49° – 68° |
| Year | 79° | 62° | 52.9" | 0.0" | 118 | 0 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in St. Augustine South
St. Augustine South gets 53 inches of rain and melted snow a year. September is the wettest month and November the driest. Rain or snow falls on about 118 days a year.
A year-round growing season
Heating and cooling a home in St. Augustine South
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In St. Augustine South, 21% of that work is heating and 79% is cooling, so air conditioning is the bigger bill.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
How St. Augustine South compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in St. Augustine South averaged 1.3° warmer than the 1900s. The biggest change is in February (+1.8°). The shift is larger than in 54% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at St. Augustine South’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. December swings the most: between 1991 and 2020 its average temperature ranged from 49° to 68°. August is the most reliable, staying within 5°.
Common questions about St. Augustine South’s climate
What is the coldest month in St. Augustine South?
January, with a typical high of 66° and a low of 47°.
What is the hottest month in St. Augustine South?
July, with a typical high of 90° and a low of 74°. About 62 days a year reach 90°.
How much snow does St. Augustine South get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in St. Augustine South?
Frost is uncommon. Only 79% of years see a night at 32° or below.
What is the rainiest month in St. Augustine South?
September, with 7.6 inches of rain and melted snow. The year totals 53 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for St. Augustine South itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at St Augustine Lighthouse, FL (3 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.